Use variable in messageTop

silens

I would like to be able to use the variable to which I make a log in the "success" data ['0']. name_tar in the messageTop: from the pdf

function accionesTG(idT) {
    var parametros = {
        "idT": idT,
    };

    tblAcciones = $('#tblAcciones').DataTable({
             dom: 'Bfrtip',
             buttons: [
            {
                extend: 'pdfHtml5',
               messageTop: "Tarea: "+tareaName //Aqui me gustaria usar `data['0'].nombre_tar`
            }
        ],

        "ajax": {
                "data": parametros,
                "url": "php/Pir/orea.php",
                "type": "POST",
                "dataSrc": "",
                "success": function (data) {
                    console.log(data['0'].nombre_tar); //Variable que me gustaría usar
                },
            },


            "columns": [
             {"data": "nombre_usr" ,"responsivePriority": "6" }
            ],
        });
}

colin

Hi @silens ,

You can make it a function, see the print button in this example,

Cheers,

Colin

silens

Thank you very much for answering, I have read the link you have posted but I still do not understand how you could use the variable of success. I do not understand much of the programming language but I try

 buttons: [
            {
                extend: 'pdfHtml5',
               messageTop: function () {
                    return data['0'].nombre_tar;
                 },
            },
             {
                extend: 'excel',
                messageTop: "Tarea: "+tareaName
            },
             {
                extend: 'print',
                messageTop: "Tarea: "+tareaName
            },
            {
                extend: 'copy',
                messageTop: "Tarea: "+tareaName
            }
        ],

colin

This code was from that last example I suggested looking at:

            {
                extend: 'print',
                messageTop: function () {
                    printCounter++;
 
                    if ( printCounter === 1 ) {
                        return 'This is the first time you have printed this document.';
                    }
                    else {
                        return 'You have printed this document '+printCounter+' times';
                    }
                },
                messageBottom: null
            }

It's using printCounter within the function as part of the message.

silens

in that case, he declares printcounter before invoking the method. In my case, the variable to use is declared when the function is executed, the variable that I need to use in the button is a field that I can only access in the success. It is a json field that feeds the table. The question is whether I can use a json field that feeds the table in the print button or move to pdf etc

"ajax": {
                "data": parametros,
                "url": "php/Pir/orea.php",
                "type": "POST",
                "dataSrc": "",
                "success": function (data) {
                    console.log(data['0'].nombre_tar); //Variable
                },
            },

colin

You can get the last JSON response with ajax.json(), so you can use that in the same function.